diff --git a/sys/netinet/tcp_input.c b/sys/netinet/tcp_input.c
index b187fa19c017..846887d2eece 100644
--- a/sys/netinet/tcp_input.c
+++ b/sys/netinet/tcp_input.c
@@ -780,8 +780,17 @@ tcp_input(struct mbuf *m, int off0)
 	/*
 	 * Grab info from PACKET_TAG_IPFORWARD tag prepended to the chain.
 	 */
-	if ((isipv6 && (m->m_flags & M_IP6_NEXTHOP)) ||
-	    (!isipv6 && (m->m_flags & M_IP_NEXTHOP)))
+        if (
+#ifdef INET6
+	    (isipv6 && (m->m_flags & M_IP6_NEXTHOP))
+#ifdef INET
+	    || (!isipv6 && (m->m_flags & M_IP_NEXTHOP))
+#endif
+#endif
+#if defined(INET) && !defined(INET6)
+	    (m->m_flags & M_IP_NEXTHOP)
+#endif
+	    )
 		fwd_tag = m_tag_find(m, PACKET_TAG_IPFORWARD, NULL);
 
 #ifdef INET6